Grosvent said he was walking to his car when someone called his name and began walking toward him.

"I turned and heard somebody say 'Do you want me to work your kid's birthday party?'" Grosvent said. "Then I recognized him as the new 95X guy."

Grosvent said the birthday comment was in reference to a tweet he sent about a month ago saying Robinson's beard made him look like a bad magician. According to Grosvent, Robinson grabbed him by the jacket and began yelling at him.

"He was saying some weird stuff like, 'I'm going to expedite your cancer,' and stuff that just made no sense," Grosvent said. "After about a minute of that I got away."

Grosvent went inside and alerted a sheriff before going to the 95X booth to "tell them that's unacceptable behavior at an event we are both working."